Bed frame

ABSTRACT

An adjustable bed frame has a pair of end rails adjustably interfitted to support varying widths of bedding thereon. The rail pairs are interfitted channel-shaped rail sections. A fastenerless latch mechanism for retaining the end rails in predetermined relation has a body portion rotatably mounted adjacent the outside surface of the back wall of the outer rail section and has opposite, transversely-turned arms positioned in overlying relation to the side walls of the outer rail. The latch arms have arcuate, inwardly-extended fingers. A plurality of pairs of openings on the inner rail are positioned to permit entrance of the latch fingers therethrough upon rotation of the latch member to lock the rail sections at an adjusted position. The fingers present convex or angled camming surfaces to the side walls of the inner rail sections so that forces tending to move the rail sections telescopically in either direction will present the side walls of the inner section against a camming finger surface, thus tending to hold the latch member in a latched position.

' United States Patent 1191 Garceau et a1.

1 1 Mar. 18, 1975 1 BED FRAME [75] Inventors: David S. Garceau; Silas J. Knoke,

both of Seymour, Ind.

[73] Assignee: Lear Siegler, Inc., Seymour, Ind.

[22] Filed: May 9, 1974 [21] Appl. No.: 468,506

[52] US. Cl 5/181, 5/184, 5/200,

403/107 [51] Int. Cl. A47c 19/04 [58] Field of Search ..5/12,1l4, 119,181,183,

1,493,104 5/1924 Carrigan 1.. 5/181 3,123,837 3/1964 Paine et al. 5/181 3,795,022 3/1974 Harris 5/181 Primary E.\'aminerCasmir A. Nunberg Attorney, Agent, or Firm-Biebel, French & Bugg [57] ABSTRACT An adjustable bed frame has a pair of end rails adjustably interfitted to support varying widths of bedding thereon. The rail pairs are interfitted channel-shaped rail sections. A fastenerless latch mechanism for retaining the end rails in pre-determined relation has a body portion rotatably mounted adjacent the outside surface of the back wall of the outer rail section and has opposite, transversely-turned arms positioned in overlying relation to the side walls of the outer rail. The latch arms have arcuate, inwardly-extended fingers. A plurality of pairs of openings on the inner rail are positioned to permit entrance of the latch fingers therethrough upon rotation of the latch member to lock the rail sections at an adjusted position. The fingers present convex or angled camming surfaces to the side walls of the inner rail sections so that forces tending to move the rail sections telescopically in either direction will present the side walls of the inner section against a camming finger surface, thus tending tov hold the latch member in a latched position.

4 Claims, 7 Drawing Figures PATEHTEDMARI 8 3,87 1 ,039

30 so 28 25 21 as BED FRAME BACKGROUND OF THE INVENTION widths. In particular, the invention relates to foldable bed frames of the general type shown in Paine et al., U.S. Pat. No. 3,123,837 of 1964 assigned to the same assignee as this invention.

In recent years there has been a renewed effort to provide adjusting and locking mechanisms for interfitting end rails of bed frames of the general type described above which are free of any loose fastener elements, to facilitate speed of set-up, and to eliminate any possibility of lost parts. This is not a new problem, but is an old problem as applied to modern bed frames. A number of expired patents are directed to an adjustable rail construction in which the fastener element is permanently fixed or attached to one of the rail members for engagement with an interfitting rail member to provide for width or length adjustment. Thus, Bergman et al., U.S. Pat. No. 674,725 of 1901 shows a threesection interfitted tubular end rail with pivotally mounted, spring-biased latches on the center section which have ends which selectively engage holes in each of the interfitted tubular end sections. Ballard, U.S. Pat. No. 1,035,765 of 1912 shows interfitted angle iron end rails which are made self-supported by reason of encircling clamps, and a spring-biased latch mounted on the end face of the outer angle iron for engagement with openings formed on the adjacent face of the inner angle iron. Thirlwall, U.S. Pat. No. 1,230,445 of 1917 shows box-section interfitted side and end rails with a leaf-spring operated latch on an outer box member engageable with V-shaped slots on the inner member. Parker, U.S. Pat. No. 1,433,741 shows channel-section side rails which are retained in inter-nested relation by encircling clamps, and a permanently attached pin which is insertable from top to bottom through the interfitted rails.

Due to the wide use of Hollywood type bed frames which must be rapidly set up in motels and the like, there has been a renewed interest in providing a fastenerless arrangement for maintaining an adjusted width. Most of the recent patents are directed to latching arrangements in which the interfitted end rails are angle irons and are thus not inherently self-supporting when they are overlapped, and thus the latch mechanisms are commonly provided with some arrangement for interlocking the rails so that they are supported on each other. Harris U.S. Pat. No. 3,744,068 of 1973 shows a spring-biased detent mechanism in combination with interlocking tabs and apertures between angle iron rails. Harris U.S. Pat. No. 3,757,361 of 1973 shows another angle iron rail connecting mechanism which employs keyhole shaped slots and rivets, and a springbiased detent. Spitz, U.S. Pat. No. 3,781,930 of 1974 uses a pair of partially-encircling spring clamps with bullet-shaped projecting pins which extend through the outer rail to engage an opening in the inner rail. Harris, U.S. Pat. No. 3,795,022 of 1974 also uses angle iron rails and employs a combination of locating rivets on the outer rail to engage holes in the inner rail and a pivotally mounted locking arm on the outer rail having a cam portion which is insertable through an access slot in the outer rail through a corresponding slot in the inner rail to engage the inner rail. In Harris U.S. Pat. No. 3,646,623 of 1972, the outer rail is provided with reentrant flange portions so that, in effect, the outer and inner rails are self-supported, and a simple snappin retainer on the inner rail which engages within openings on the outer rail maintains an adjusted position.

SUMMARY OF THE INVENTION This invention is directed to an adjustable bed frame, particularly, frames of the Hollywood type, in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, and in which the end rails are at least self-supporting when they are in the interfitted position, such as a pair of interfitted channel-shaped rail sections in which each section has a back wall and a pair of side walls. The invention is more particularly directed to a double-ended latch member which is rotatably mounted on one of the end rails and which has a pair of fingers which are movable into engagement with the other end rail to lock the end rail sections into a pre-determined adjusted position. The side walls of the inner rail section are provided with a plurality of pairs of openings within which the latch fingers move upon rotation of the latch member to lock the rail sections at a pre-determined interfitted position. The fingers formed on the latch member present an outer curved or angled surface to the adjacent wall of the inner rail member so that forces which tend to move the rail sections telescopically in either direction will present the side walls of the inner rail section against an angled or curved surface thus urging and tending to hold the latch in its operative or latching position. When the latch is rotated to a retacted position, the fingers are withdrawn clear of the openings in the inner rail section to permit telescopic movement of the rail sections.

The latch member is double ended and is formed with a generally flat body portion mounted against or adjacent the outside surface of the back wall of the outer rail section and is provided with a pair of opposite transversely-turned arms which are positioned in a generally overlying relation to the opposite side walls of the outer rail, so that if bedding applied to the frame lies on the rail, it will engage the exposed upper latch arm and thus tend also to hold the latch member in its operative position.

It is a particular object of this invention to provide a latch mechanism for interfitted channel-section end rails in an adjustable bed frame.

A further object of the invention is the provision of an improved adjustable bed frame having a fastenerless latch mechanism which tends to be self-locking in the latched position upon the application of separating forces.

A further object of the invention is the provision of a latch mechanism which is of simple construction and which is positive in operation.

Another important object of the invention is the provision, in an adjustable bed frame as outlined above, of a latch mechanism which is easy to use and which does not thereafter obstruct the normal use and operation of the bed frame and which is relatively immune to damage during handling or shipping.

These and other objects and advantages of the invention will be apparent from the following description,

the accompanying drawings and the appended claims.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a bed frame having a latch member constructed according to this invention;

FIG. 2 is a fragmentary perspective of the interfitted end rails showing the latch member in the operative or latched position;

FIG. 3 is a view similar to FIG. 2 but showing the latch member in the retracted or open position;

FIG. 4 is an end elevation of the rail sections of FIG. 2 showing the latch member in the operative position in solid lines and further showing the member in the re tracted position in broken lines;

FIG. 5 is a partially broken away view of the latching mechanism from inside the rails;

FIG. 6 is a section taken generally along the line 6-6 of FIG. 4; and,

FIG. 7 is a plan view of the inside end rail section showing the arrangement of the latch openings.

DESCRIPTION OF PREFERRED EMBODIMENT A Hollywood type bed frame to which the present invention is applied is illustrated in FIG. 1 as including a pair of channel-shaped side rails 10 and 12 which extend longitudinally between corner structures 14. Headboard brackets 15 are carried on the inner ends of the side rails 12. Box spring locking tabs 16 are fixed to the upper surfaces of the side rails and extend outwardy and upwardly to engage with the sides of a box spring carried on the frame. The construction of the bed frame thus far described, including the side rails, the box spring engaging tabs and the corner constructions, is essentially that as described and claimed in the above-identified U.S. patent of Paine et al.

The frame includes generally channel-shaped end rails which are pivotally mounted on the corner structures and which are movable between folded positions adjacent the side rails and transversely extended positions shown in FIG. 1. The end rails are interfitted in pairs to support varying widths of bedding thereon, and include an outer rail section 20 and an inner, telescopically-interfitting rail section 22.

While the end rail sections 20 and 22 as used in the present invention are of a generally channel-shaped construction similar to that shown in Paine et al, they are preferably formed with reentrant portions and are positioned in back-to-back relation, as shown in crosssection in FIG. 6 to provide a self-supporting interfitted structure. More particularly, the outer rail section is formed with a back wall 25 and a pair of flat side walls 26 and 27 terminating in inwardly turned ends 28. The inner rail section is also formed with a back wall 30, a pair of flat side walls 32 and 33, also having inwardly turned ends 34. The outside dimensions of the inner rail section 22 is slightly less than the inside dimensions of the outer section 20 providing for ease of telescopic movement, while the inwardly turned ends 28 engage the ends 34 and prevent the rail sections from becoming disassociated except by withdrawal of one from the other.

The present invention further includes a fastenerless latch mechanism for retaining each of the pairs of rails 20 and 22 in pre-determined adjusted relation. The latch mechanism 40 permits adjustment for the standard widths of bedding, namely 3/3 commonly known as twin size, 4/0 commonly known as threequarter size, 4/6 commonly known as full size, and 5/0 commonly known as queen size. Also, two frames may be placed side-by-side at the 3/3 size to support king size bedding. However, since the actual width of the box springs and mattresses varies somewhat in the industry for each of the four sizes recited, there must be some provision for providing for width adjustments within each of these sizes. Also, it is highly desirable that a latch mechanism be provided which is fastenerless in the sense that loose nuts and bolts are eliminated, and which is both positive and easy to operate, permitting the frames to be readily set up by inexperienced persons.

To this end, the latch mechanism 40 includes a sheet metal stamped, double-ended latch member 42 which is formed with a generally flat body portion 43 which is positioned adjacent the outside surface of the back wall 25 of the outer rail section 20. Preferably, the

, body portion 43 is pivotally mounted adjacent the back wall 25 by means of a rivet 44 received centrally of an outwardly deep-embossed portion 45 on the back wall. The portion 45 is embossed in the form of a horizontal rectangle normally underlying the body portion, and on the inside of the rail, provides a clearance space for the inside head of the rivet 44, and on the outside surface provides support for the member 42.

The latch member 42 is formed with a pair of opposite, transversely-turned flat arms 46 which are positioned in respective partially overlying relation to the walls 26 and 27 of the outer rail section 20. Each of the arms is terminated in an arcuately-shaped inwardlyextending finger 50. The fingers 50 are each formed wth a convex outer surface 52 and a concave inner surface 53, as shown in FIGS. 4 and 5.

The outer rail section 20 includes means defining a pair of transversely-staggered or offset clearance openings 55 formed in the wall sections 26 and 27 through which the fingers 50 simultaneously move as the latch member 42 is rotated between a retracted position (as shown in FIG. 3 and as shown in broken lines in FIG. 4), in which the fingers 50 are clear of the openings 55, into a latched or operative position in which the fingers 50 extend through the openings 55, as best shown in FIG. 5. The openings 55 are thus positioned and proportioned to receive the fingers 50 and do not necessarily make any camming or latching contact with these fingers.

The side walls 32 and 33 on the inner rail section 22 are provided with means defining a plurality of pairs of laterally-offset latch openings 58. The pairs of latch openings 58 are arranged in sets of openings. These sets are spaced along the inner rail sections 22 to define the spaced-apart adjustments of the side rails 10 and 12 corresponding to the several widths of as previously described.

The sets of openings 58 correspond to the general bedding widths as previously described, and for each bedding width there is placed inwardly of the associated set of openings 58 an index mark 59 with a legend such as 4/6 as shown in FIG. 3. The mark 59 and legend are related to the sets of openings 58 so that they are exposed on the outside surface of the inner rail 22 just opposite the terminal end of the rail 20 and adjacent the latch member 42. In order to accommodate variations which occur between different box springs of the same general size, there may be provided two or more pairs of the openings 58 in each set of openings and, as

shown in FIG. 7, two pairs of openings 58 are provided at the end of the inner rail 22 corresponding to the 5/0 position to provide selection between two possible adjustments for this width of bedding. The spacing between adjacent openings 58 may be such as to provide a inch adjustment between pairs of openings, and while the extent of adjustment between pairs of openings is not critical, it has been found that adjustments at inch intervals is adequate for the purpose of accommodating the varying widths of box springs within a given size range.

The openings 58 are transversely offset from each other in the inner rail section 22 a sufficient distance so as to permit the unrestricted entrance of the fingers 50 therethrough upon the rotating movement of the latch member 42 into its operative position, to lock the rail sections and 22 at a given interfitted adjusted position. Thus, the transverse spacing of the openings 58 in each pair of openings is preferably somewhat greater than the corresponding spacing of the openings 55 to provide clearance for the arcuate movement of the fingers 50 therethrough without interference.

The body portion 43 is provided with a pair of outwardly turned tabs 60 so that the member 42 may be easily gripped for opening movement. The tabs 60 extend in a direction generally parallel to the side walls 26 and 27 and are thus in non-interfering relation to any bedding placed on the rail sections. The closing movement of the latch member 42 is most readily accomplished by simultaneously pressing against the flat upper surfaces of the arms 46 to move the latch member from the position shown in broken lines shown in FIG. 4 to the operative position shown in full lines.

When the latch is in its operative position as shown in FIG. 5, the arms 46 are in generally flat overlying relation to the adjacent walls 26 and 27, and if the box spring is placed on the upper surface of the rail sections 20 and 22, it will rest on the adjacent upper surface of one arm 46 without interference.

The fingers 50 also serve to retain the latch member in its operative position in that they present convex outer surfaces 52 to the ends of the openings 58 in the adjacent side walls 32 and 33 on the inner rail section. The angled outer surfaces 52 are such that any force tending to move the rail sections telescopically in either direction will force the end of one of the openings 58 in the inner rail section 22 in which its fingers 50 are engaged against the convex of the surface 52 of one of its fingers 50, thus urging and tending to hold the latch member 42 in its operative position, this holding engagement being with the upper finger 50 if the rails are pushed together and with the lower finger 50 if the rails are pulled apart. This cooperative engagement between the inner rail section walls 32 and 33 at the openings 58 and the outer angled or convexly curved surfaces 52 is effective to urge the latch member into its operative position, whether the forces which tend to move the interfitted rail sections are tending to extend or collapse the rail sections. i

The operation of this invention is largely selfevident from the foregoing description. In setting up the bed frame, the interfitted rail sections 20 and 22 are moved to approximately the desired position with the latch member 42 in its open position. When the box spring tabs 16 have come into locking engagement with the side walls of the box spring, the latch members 42 are rotated into the closest adjacent pairs of latch openings 58 and the set-up is completed. Thereafter, the selfcamming action between the fingers and the rail sections, as described, together with the presence of the bedding on the upper arms 46 assures that the adjusted position is retained. [f it should become necessary again to re-adjust the frame it is a simple matter to grip the tabs 60 and rotate the member 42 on the rivet 44 to the open position and make the necessary adjustment. It may also be appreciated that while a rivet 44 is used as the pivot, the latch member works quite well without the rivet and would be fully retained in the operative position by reason of the forces previously described. However, when the member 42 is in its open position in the absence of the rivet, the member 42 may be withdrawn and hence may be lost or dislodged and accordingly the employment of the rivet 44 is preferred.

When the latch member 42 is in its operative position, both the body portion 43 and the arms 46 are es sentially flush with the corresponding adjacent walls 25, 26, and 27 of the outer rail section. The finger tabs 60 extend only a very short distance outwardly. Thus, the latch member is essentially unobtrusive and is compact. Also, for these reasons, it is well protected against damage during handling and shipping and it is free of protruding pins or other parts which may be knocked loose or dislodged.

While the form of apparatus herein described constitutes a preferred embodiment of the invention, it is to be understood that the invention is not limited to this precise form of apparatus, and that changes may be made therein without departing from the scope of the invention.

What is claimed is:

1. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, and in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in predetermined relation, comprising a double-ended latch member having a generally flat body portion rotatably mounted adjacent the outside surface of the back-wall of said outer rail section, said latch member having opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms having an arcuateiy-formed, inwardly extended finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch member is rotated to a locking position, means in said side walls of said inner rail defining a plurality of pairs of openings selectively alignable with said clearance openings to define pre-determined adjusted position in response to telescopic movement of said end rail sections, said opening pairs being positioned to receive said fingers therethrough upon rotation of said latch member to lock said rail sections at a selected said adjusted position, said fingers in said locking position presenting camming surfaces to the side walls of said inner rail sections so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner section against a camming finger surface thus tending to hold said latch member in its locking position.

2. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a double-ended latch member having a generally flat body portion pivotally mounted adjacent the outside surface of the back wall of said outer rail section, said latch member having a pair of opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms terminating in an inwardly extended finger, each said finger having a convex outer surface, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated between a retracted position in which said fingers are clear of said openings to an operative position with said fingers extending through said openings, means in the side walls of said inner rail defining a plurality of pairs of latch openings selectively alignable with said clearance openings to define predetermined adjusted position in response to telescopic movement of said end rail sections, said latch opening pairs being positioned to receive said fingers therethrough upon rotation of said latch member to said operative position to lock said rail sections at a selected position, said fingers in said operative position presenting convex surfaces to said side walls of said inner rail sections so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner rail section against a convex finger surface thus urging to hold each latch member toward its operative'position.

3. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, and in which said rail pairs comprise interfitted rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a latch member having a body portion positioned adjacent the outside surface of the back wall of said outer rail section, said latch member having opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms having an inwardly extended finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated to a locking position, means in the side walls of said inner rail defining a plurality of pairs of openings selectively alignable with said clearance openings to define predetermined adjusted position in response to telescopic movement of said end rail sections, said opening pairs being positioned to receive said fingers therethrough upon said rotating said member to lock said rail sections at a selected said adjusted position, said fingers in said locking position presenting angled surfaces to the side walls of said inner rail sections so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner section against a finger surface tending to hold said latch member in its locking position.

4. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a double-ended latch member having a body portion pivotally mounted adjacent the outside surface of the back wall of said outer rail section, said latch member having a pair of opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms terminating in an inwardly extended latch finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated between a retracted position to an operative position, means in the side walls of said inner rail defining a plurality of pairs of latch openings selectively alignable with said clearance openings to define predetermined adjusted position in response to telescopic movement of said end rail sections, said latch opening pairs being positioned to receive said fingers therethrough upon rotating movement of said member to said operative position to lock said rail sections at an adjusted position. 

1. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, and in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a double-ended latch member having a generally flat body portion rotatably mounted adjacent the outside surface of the back wall of said outer rail section, said latch member having opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms having an arcuately-formed, inwardly extended finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch member is rotated to a locking position, means in said side walls of said inner rail defining a plurality of pairs of openings selectively alignable with said clearance openings to define pre-determined adjusted position in response to telescopic movement of said end rail sections, said opening pairs being positioned to receive said fingers therethrough upon rotation of said latch member to lock said rail sections at a selected said adjusted position, said fingers in said locking position presenting camming surfaces to the side walls of said inner rail sections so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner section against a camming finger surface thus tending to hold said latch member in its locking position.
 2. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a double-ended latch member having a generally flat body portion pivotally mounted adjacent the outside surface of the back wall of said outer rail section, said latch member having a pair of opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms terminating in an inwardly extended finger, each said finger having a convex outer surface, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated between a retracted position in which said fingers are clear of said openings to an operative position with said fingers extending through said openings, means in the side walls of said inner rail defining a plurality of pairs of latch openings selectively alignable with said clearance openings to define pre-determined adjusted position in response to telescopic movement of said end rail sections, said latch opening pairs being positioned to receive said fingers therethrough upon rotation of said latch member to said operative position to lock said rail sections at a selected position, said fingers in said operative position presenting convex surfaces to said side walls of said inner rail sectioNs so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner rail section against a convex finger surface thus urging to hold each latch member toward its operative position.
 3. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, and in which said rail pairs comprise interfitted rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a latch member having a body portion positioned adjacent the outside surface of the back wall of said outer rail section, said latch member having opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms having an inwardly extended finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated to a locking position, means in the side walls of said inner rail defining a plurality of pairs of openings selectively alignable with said clearance openings to define pre-determined adjusted position in response to telescopic movement of said end rail sections, said opening pairs being positioned to receive said fingers therethrough upon said rotating said member to lock said rail sections at a selected said adjusted position, said fingers in said locking position presenting angled surfaces to the side walls of said inner rail sections so that forces tending to move said rail sections telescopically in either direction will present the side walls of the inner section against a finger surface tending to hold said latch member in its locking position.
 4. An adjustable bed frame in which a pair of end rails are adjustably interfitted to support varying widths of bedding thereon, in which said rail pairs comprise interfitted channel-shaped rail sections each having a back wall and a pair of side walls, the improvement in a fastenerless latch mechanism for retaining each of said pairs of rails in pre-determined relation, comprising a double-ended latch member having a body portion pivotally mounted adjacent the outside surface of the back wall of said outer rail section, said latch member having a pair of opposite transversely turned arms positioned in generally overlying relation to the side walls of said outer rail, each of said arms terminating in an inwardly extended latch finger, means in said outer rail side walls defining clearance openings through which said fingers simultaneously move as said latch is rotated between a retracted position to an operative position, means in the side walls of said inner rail defining a plurality of pairs of latch openings selectively alignable with said clearance openings to define pre-determined adjusted position in response to telescopic movement of said end rail sections, said latch opening pairs being positioned to receive said fingers therethrough upon rotating movement of said member to said operative position to lock said rail sections at an adjusted position. 